http://bugs.wireshark.org/bugzilla/show_bug.cgi?id=1545
------- Comment #9 from jaap.keuter@xxxxxxxxx 2007-05-10 06:02 GMT -------
/* Taken from add-135a (BACnet-IP-standard paper):
*
* The default UDP port for both directed messages and broadcasts shall
* be X'BAC0' and all B/IP devices shall support it. In some cases,
* e.g., a situation where it is desirable for two groups of BACnet devices
* to coexist independently on the same IP subnet, the UDP port may be
* configured locally to a different value without it being considered
* a violation of this protocol.
*/
In this case the non standard UDP port 47899 is used. To get it decoded as
BACnet packets choose 'decode as...' and select BVLC.
A more permanent solution is to add a preference to the dissector, setting an
optional alternative UDP port number.
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